Here are my finished safety vests for my dogs. (You can get the basic idea of how I made them in the last photo)

We take them for walks at night and I can barely see them in the park when they're running around. These vests help me keep tabs on them! Also, there are walkways around the park where we may see the odd cyclist. The vests ensure that the cyclist can see my dog at night if they just happen to be in the cyclist's path.

very cool. I've got a few old hi-vis vests that I've stashed away for the exact same project, now I just need to get onto it and sew them!

Oh cool! That's great to hear that somebody else had the same idea for their doggies. I have to say that the vests have been really handy in another way too! My dogs roll in poop every now and then (gross) and instead of sticking my dogs in the dreaded shower, all I have to do is chuck their safety vest into the washing machine

Let me know how yours turn out. I'm just a beginner so my "patterns" aren't all that complicated I made a video of my process on YouTube. I would love to compare notes: